Umm...Does this mean my turbo's F**ked
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Attachment 209066
I pulled the charge pipe from the IC and it pours out oil. Attachment 209067 Oil pooling at the intake side of the turbo. Cruising, the car doesn't smoke. But just recently and somewhat intermittently at WOT, the car smokes like an F-18 during fleet week. ...getting a sinking feeling... |
:crx:
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Looks like there is a blown seal, is that a BB turbo or journal bearing turbo?
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Possible blown seals. Is there any shaft play? Is that a BB turbo? How many miles?
You can probably get it rebuilt, but figure out first why it failed. It sounds like either too high of pressure into the oil inlet or a poor drain system. Do you have a tube from the valve cover to the intake? EDIT: Oh I should of looked at your mod list ha! |
Ok before we jump to conclusions:
1. how is your crankcase breather hooked up, just a tube hooked up to just before the intake? 2. Are you using the stock PCV (little black check valve going between valve cover and Intake manifold) If the PCV is failing and letting boost get into the valve cover, then it could cause excessive oil to be pushed out the breather tube and thus into the mouth of the turbo. |
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Attachment 209065
Oil pouring out of IC. Maybe 6-8oz.total. |
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The motor has maybe 3k mi. on it, and the turbo probably has 2500.
Very little play at turbine shaft. Feels normal. Like an idiot I was using the stock PVC valve. When it started smoking I went to an open breather. The crankcase vent near the oil filler dumps into the intake pipe just after the filter. This is what my setup looks like: Attachment 209064 |
Run both breathers to a catch can with a breather on the catch can. It's either oil from the crankcase, which is bad, or oil from the turbo, which is also bad.
Is your oil return kinked? |
Originally Posted by Savington
(Post 354177)
Is your oil return kinked?
You probably have the return line to the pan, so chances are its not the return line then. I'd go with the turbo seals. Vash- |
I'd be more inclined to say your rings aren't up to snuff and you have blow-by.
That means I'm saying it's not your turbo's "seals." OFF TOPIC: On your reroute, the hose that goes over your valve cover, is it higher than the filler cap on the radiator??? |
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I'd be more inclined to say your rings aren't up to snuff and you have blow-by. OFF TOPIC: On your reroute, the hose that goes over your valve cover, is it higher than the filler cap on the radiator??? Run both breathers to a catch can with a breather on the catch can. ...fingers crossed... Here's my catch can -- at least until I find something better to use. Attachment 209060 |
That catch can will work perfectly.... I've run a few like that :p
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Do you have a restrictor in the oil feed? I know some of the newer Garret GT series turbos have them built into the oil inlet, but on others you need to run something to reduce the oil pressure going into the turbo. (This is common knowledge to some but not all, not trying to insult your intelligence).
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that's a brand new 2860rs...
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Do you have oil coming out the turbine side? If not I'd say the oil is either getting sucked through the compressor from air inlet obstruction. Clogged air filter, something in a pipe, etc. The other option is that it's coming out the valve cover.
Typically, if it's a drain problem or and over-pressure problem, it'll be coming out both sides of the turbo. But you know, you see it all around here. |
Im going to guess high oil pressure to the turbo. Like Boileralum said, if there isnt a restrictor in the line, or one built in, your probably just blowing oil past the seals. Sure you have no smoke?
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If you fill that can, you have blowby from the motor. My 155k mile motor soaks the area around the filler cap with oil. If I didn't have a breather straight on the cover, my pipes would probably be SOAKED.
323GTX PCV + filter on the valve cover + blind stupid luck = my pipes are 100% dry all the time. |
I hope his 3k mile engine doesnt have that kind of issue. Makes me worry about my first start up next weekend.
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Originally Posted by boileralum
(Post 354285)
Do you have a restrictor in the oil feed? I know some of the newer Garret GT series turbos have them built into the oil inlet, but on others you need to run something to reduce the oil pressure going into the turbo. (This is common knowledge to some but not all, not trying to insult your intelligence).
Im beginning to think its the pcv valve, now that you say you were using the stock one. |
Originally Posted by thesnowboarder
(Post 354676)
If it were doing so and that much oil would be going into the intake pipes then that much would be coming out of the exhaust side as well, and he isnt smoking.
Im beginning to think its the pcv valve, now that you say you were using the stock one. Not saying it is the oil pressure for sure, but I have seen it happen on other cars running BB turbos. The PCV valve does sound like a good candidate as well. Either way, I hope it isn't a blown turbo, but rather something easily and cheaply fixed. |
I blew a turbo a while back being the idiot that i am, i tightened my steel braided return line and it kinked right behind my charge pipe so i couldn't see it without really looking hard. It restricted flow enough and oil passed the seals. Poured out the tail pipe just like the OPers charge pipes look, my charge pipes looked identical to his at the time of fail. Granted this was on a journal bearing turbo so im not sure the strength of the BB turbos, but i blew mine in a long 25 seconds.
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Ok, it isn't the turbo. There's no external restrictor, but it's a brand new turbo so I think it has one built in. And the drain line is pretty straight. It's as straight as I could get it and there are no kinks.
My experiment with the makeshift catch can was very telling. Attachment 209024 Don't ever do this! After driving about 30mi. it started smoking again. I stopped to check it out and the can was full and spilling out onto the exhaust. That's a full 12oz of oil! Short length of hose and a downward slope--not a good idea. Strangely the breather I put on the pcv valve never showed signs of oil. So I figured the valve is staying shut and forcing all of the crankcase gasses out the other vent. I think the increased velocity may have been aerosolizing the oil and helping it escape as well. So I gutted the pcv and drilled out the orifice to a decent size then connected both vents with a tee to the can. Like this: Attachment 209025 The longer length of hose and an upward slope of the runs help with oil recovery. So far so good. I've only got a couple of drops in the can after 10 mi. |
Also don't connect the vent to your intake the way BEGi shows. That's what started this problem in the first place.
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I had the vent hooked up directly to the intake like they recommend on my 90' when it had the turbo setup and I never had that problem. I had a bit of oil in the intake, but just a little coating on the pipes.
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Originally Posted by bryanlow
(Post 354797)
Also don't connect the vent to your intake the way BEGi shows. That's what started this problem in the first place.
OKAY. :jerkit: <----that's sarcasm. The breather line back into the intake is one of the better way of relieving excess crankcase pressure. While it may get some oil vapors/mist into your intake, it's of no concern. The problem is:
The fact that without a pcv hooked up and you filled the catch can, I'm suggesting you check your wet/dry compression asI believe you have condition #3. |
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